regdef.h

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/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 1985 MIPS Computer Systems, Inc.
 * Copyright (C) 1994, 95, 99, 2003 by Ralf Baechle
 * Copyright (C) 1990 - 1992, 1999 Silicon Graphics, Inc.
 * Copyright (C) 2011 Wind River Systems,
 *   written by Ralf Baechle <[email protected]>
 */
#ifndef _ASM_REGDEF_H
#define _ASM_REGDEF_H

#include <asm/sgidefs.h>

#if _MIPS_SIM == _MIPS_SIM_ABI32

/*
 * Symbolic register names for 32 bit ABI
 */
#define zero    $0      /* wired zero */
#define AT      $1      /* assembler temp  - uppercase because of ".set at" */
#define v0      $2      /* return value */
#define v1      $3
#define a0      $4      /* argument registers */
#define a1      $5
#define a2      $6
#define a3      $7
#define t0      $8      /* caller saved */
#define t1      $9
#define t2      $10
#define t3      $11
#define t4      $12
#define ta0 $12
#define t5      $13
#define ta1 $13
#define t6      $14
#define ta2 $14
#define t7      $15
#define ta3 $15
#define s0      $16     /* callee saved */
#define s1      $17
#define s2      $18
#define s3      $19
#define s4      $20
#define s5      $21
#define s6      $22
#define s7      $23
#define t8      $24     /* caller saved */
#define t9      $25
#define jp      $25     /* PIC jump register */
#define k0      $26     /* kernel scratch */
#define k1      $27
#define gp      $28     /* global pointer */
#define sp      $29     /* stack pointer */
#define fp      $30     /* frame pointer */
#define s8  $30 /* same like fp! */
#define ra      $31     /* return address */

#endif /* _MIPS_SIM == _MIPS_SIM_ABI32 */

#if _MIPS_SIM == _MIPS_SIM_ABI64 || _MIPS_SIM == _MIPS_SIM_NABI32

#define zero    $0  /* wired zero */
#define AT  $at /* assembler temp - uppercase because of ".set at" */
#define v0  $2  /* return value - caller saved */
#define v1  $3
#define a0  $4  /* argument registers */
#define a1  $5
#define a2  $6
#define a3  $7
#define a4  $8  /* arg reg 64 bit; caller saved in 32 bit */
#define ta0 $8
#define a5  $9
#define ta1 $9
#define a6  $10
#define ta2 $10
#define a7  $11
#define ta3 $11
#define t0  $12 /* caller saved */
#define t1  $13
#define t2  $14
#define t3  $15
#define s0  $16 /* callee saved */
#define s1  $17
#define s2  $18
#define s3  $19
#define s4  $20
#define s5  $21
#define s6  $22
#define s7  $23
#define t8  $24 /* caller saved */
#define t9  $25 /* callee address for PIC/temp */
#define jp  $25 /* PIC jump register */
#define k0  $26 /* kernel temporary */
#define k1  $27
#define gp  $28 /* global pointer - caller saved for PIC */
#define sp  $29 /* stack pointer */
#define fp  $30 /* frame pointer */
#define s8  $30 /* callee saved */
#define ra  $31 /* return address */

#endif /* _MIPS_SIM == _MIPS_SIM_ABI64 || _MIPS_SIM == _MIPS_SIM_NABI32 */

#endif /* _ASM_REGDEF_H */